摘要
设计NaX分子筛负载低毒稀土氧化物和钛酸四丁酯为复合催化剂,成功合成出聚丁二酸丁二醇酯(PBS).探讨熔融缩聚法、溶液-熔融结合法,以及其反应条件对所合成的PBS相对分子质量的影响,确定最佳合成条件为220℃,缩聚3h,可以合成出质均相对分子质量为17.8万的PBS.通过核磁、红外光谱,凝胶渗透色谱和热分析仪对合成的PBS进行表征和测试.结果表明:目标产物确认为PBS,具有良好的热稳定性.
Poly(butylene succinate)(PBS)was synthesized with a new catalyst of NaX molecular sieve-supported ligand Nd2O3/Ti(OC4H9)4by polycondensation.The synthetic methods,including melt polycondensation and solution-melting method,as well as the reaction conditions were investigated on the PBS molecular weight.The weight-average molecular weight of PBS was about 178 000 under the synthesis conditions of 220℃ and 3h condensation.The product was further characterized by -1 H NMR spectroscopy,infrared spectroscopy,gel permeation chromatograph and thermal analyzer.The results showed that the synthetic product was PBS with a good thermal stability.
出处
《华侨大学学报(自然科学版)》
北大核心
2017年第2期180-183,共4页
Journal of Huaqiao University(Natural Science)
基金
国家自然科学基金资助项目(21473096)
福建省科技厅引导性科技计划项目(2016Y0073)
福建省自然科学基金资助项目(2016J01740)
福建省教育厅中青年教师教育科研项目(JA15554)
宁德市科技局项目(20150253)
关键词
聚丁二酸丁二醇酯
熔融缩聚
溶液-熔融法
氧化钕
钛酸四丁酯
分子筛
poly(butylene succinate)
melt polycondensation
solution-melting method
neodymium oxide
tetrabutyl titanate
molecular sieve